package com.sky.service.impl;

import com.sky.context.BaseContext;
import com.sky.dto.ShoppingCartDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.ShoppingCart;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.mapper.ShoppingCartMapper;
import com.sky.service.ShoppingCartService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

@Service
@Slf4j
public class ShoppingCartServiceImpl implements ShoppingCartService {
    
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    
    @Autowired
    private DishMapper dishMapper;
    
    @Autowired
    private SetmealMapper setmealMapper;

    /**
     * 添加购物车
     * @param shoppingCartDTO
     */
    public void addShoppingCart(ShoppingCartDTO shoppingCartDTO) {
        ShoppingCart shoppingCart = new ShoppingCart();
        BeanUtils.copyProperties(shoppingCartDTO, shoppingCart);
        Long userId=BaseContext.getCurrentId();
        shoppingCart.setUserId(userId);
        //设置用户ID

        
        //判断当前加入到购物车的商品是否存在
        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);
        
        if(list != null && list.size() > 0) {
            //如果已经存在，就更新数量
            ShoppingCart cart = list.get(0);
            cart.setNumber(cart.getNumber() + 1);
            shoppingCartMapper.updateNumberById(cart);
        } else {
            //如果不存在，就插入一条新的数据
            Long dishId = shoppingCartDTO.getDishId();
            
            if(dishId != null) {
                //添加的是菜品
                Dish dish = dishMapper.getById(dishId);
                shoppingCart.setName(dish.getName());
                shoppingCart.setImage(dish.getImage());
                shoppingCart.setAmount(dish.getPrice());
            } else {
                //添加的是套餐
                Long setmealId = shoppingCartDTO.getSetmealId();
                Setmeal setmeal = setmealMapper.getById(setmealId);
                shoppingCart.setName(setmeal.getName());
                shoppingCart.setImage(setmeal.getImage());
                shoppingCart.setAmount(setmeal.getPrice());
            }
            
            shoppingCart.setNumber(1);
            shoppingCart.setCreateTime(LocalDateTime.now());
            shoppingCartMapper.insert(shoppingCart);
        }
    }

    /**
     * 查看购物车
     * @return
     */
    public List<ShoppingCart> showShoppingCartList() {
        Long userId = BaseContext.getCurrentId();
ShoppingCart shoppingCart=ShoppingCart.builder()
            .userId(userId)
            .build();
        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);

        return list;
    }


  public void cleanShoppingCart() {
      Long userId = BaseContext.getCurrentId();
      shoppingCartMapper.deleteByUserId(userId);
  }
}
